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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 01097000 ASSABET RIVER AT MAYNARD, MA


Middlesex County, Massachusetts
Hydrologic Unit Code 01070005
Latitude  42°25'55", Longitude  71°27'01" NAD27
Drainage area 116  square miles
Contributing drainage area 116  square miles
Gage datum 146 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1940-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 215 240 287 493 309 195 106 69 64 94 134 193
2 221 231 287 510 299 200 106 68 69 87 133 195
3 222 241 308 515 287 205 104 66 71 82 137 196
4 224 262 326 512 284 203 102 62 69 81 142 192
5 223 268 331 507 277 197 101 59 62 84 144 189
6 217 255 332 504 266 200 96 56 58 89 146 191
7 213 245 348 486 257 207 90 55 62 92 144 199
8 208 244 365 459 250 214 88 61 65 92 144 206
9 211 234 369 429 248 209 94 67 68 94 148 208
10 223 222 373 404 250 198 101 70 69 91 152 211
11 233 223 370 392 255 185 98 70 74 89 157 216
12 228 230 371 380 255 170 94 69 81 88 159 230
13 226 227 372 371 253 164 90 68 84 88 160 234
14 224 230 385 370 253 171 88 67 77 89 161 231
15 223 234 413 362 250 173 83 66 71 96 165 236
16 219 241 419 368 247 162 81 66 66 107 164 233
17 212 248 420 393 248 154 77 65 63 117 165 231
18 204 251 434 395 245 149 78 67 68 114 163 237
19 205 258 448 378 240 141 77 81 81 109 157 246
20 208 255 444 361 234 133 76 112 84 110 149 237
21 212 251 435 341 227 128 76 106 79 121 150 226
22 219 255 447 330 219 122 77 86 76 126 157 223
23 229 265 476 331 206 119 81 73 72 121 170 225
24 242 270 482 336 195 119 91 68 73 117 177 229
25 276 291 468 333 194 117 92 64 73 116 178 233
26 313 313 456 323 197 115 84 60 78 123 185 235
27 320 310 451 318 201 113 77 56 80 125 192 234
28 325 299 451 314 197 113 74 58 80 124 190 230
29 303 297 452 312 188 113 73 61 86 126 189 222
30 274   467 312 186 109 74 62 93 135 192 218
31 253   485   189   70 64   136   217